@book{104442,
	author = {Yang, Kai. and ebrary, Inc.},
	title = {Design for six sigma for service},
	publisher = {McGraw-Hill,},
	year = {c2005.},
	series = {Six sigma operational methods series},
	address = {New York :},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10180029}
}